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Answer:
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Explanation:
A coil of many circular turns of insulated copper wire is called solenoid . In fact the magnetic feild lines in bar magnet is similar to that of solenoid . In fact on end of the solenoid behaves as North pole and the other end as south pole . The feild lines inside the solenoid are parallel straight lines. this indicates that field inside the solenoid is uniform
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Answer:
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The magnetic field generated is always perpendicular to the direction of the current and parallel to the solonoid. Hence if we reverse the current the direction of magnetism also reverses. In other words the magnetic poles gets reversed (North pole becomes south pole and the south pole becomes the north pole).